Re: CP unresponsive on certain guests
Since the STORBUF setting is exactly the values I suggested, I suspect you applied the SET SRM STORBUFF 300% 250% 200% prior to doing the Q SRM With the current setting for STORBUFF, are you still experiencing the problem? Also, on a related note, what does your zVM paging system look like? The output of CP Q ALLOC PAGE will provide the information Mike - Original Message - From: Daniel Tate daniel.t...@gmail.com To: IBMVM@LISTSERV.UARK.EDU Sent: Thursday, September 16, 2010 10:52 AM Subject: Re: CP unresponsive on certain guests Output of Q SRM q srm IABIAS : INTENSITY=90%; DURATION=2 LDUBUF : Q1=100% Q2=75% Q3=60% STORBUF: Q1=300% Q2=250% Q3=200% DSPBUF : Q1=32767 Q2=32767 Q3=32767 DISPATCHING MINOR TIMESLICE = 5 MS MAXWSS : LIMIT=% .. : PAGES=99 XSTORE : 0% Ready; T=0.01/0.01 09:49:05 On Wed, Sep 15, 2010 at 5:47 PM, Dave Jones d...@vsoft-software.com wrote: Hi, Daniel. The answer to your first question is to use the CP FORCE command (HELP CP FORCE will tell you all about it.) The VM user id issuing the FORCE command needs to have privilege class A as well. Usually this is done from either MAINT or OPERATOR. The answer to your second question is a bit more difficult, I'm afraid. As Marcy has already suggested, what does a Q SRM command show? My first guess would be that your SLES11 guest is falling into Q3 and never given an opportunity to run. To find out *why* the guest is not able to run, you need the services of a good z/VM performance monitor.IBM offers the Performance Monitor (it comes bundles with z/VM, but it's an extra cost offering) and Velocity Software (http://www.velocity-software.com/) has a very good suite of products as well. IMHO it' practically impossible to run a modern production grade z/VM-zLinux system without a good performance monitor to help solve issues like the one your having now. On 09/15/2010 05:14 PM, Daniel Tate wrote: We're starting to run apps on the servers now. From time to time a guest will become unresponsive - to be more precise, ,the CP will not respond to commands, and neither will the guest OS (SLES11). not even #CP LOGOFF is acknowledged. from another login, CP INDIIC LOAD shows no appreciable load. Two questions from this: 1) how would I force a logoff of a user from another user? Is this possible? 2) if we are not paging and the IFLs are not loaded (2-3% utilization as a matter of fact) what could the bottleneck be? -- Dave Jones V/Soft Software www.vsoft-software.com Houston, TX 281.578.7544
Re: CP unresponsive on certain guests
Yeah, that is probably where he needs to end up Dave, but I'm a little hesitant to recommend the 300% for Q3 without feeling more comfortable about his paging subsystem... Moving a couple of large guests from the E-list to in-Q could cause a increase in paging that he may or may not be configured to handle. Mike - Original Message - From: Dave Jones d...@vsoft-software.com To: IBMVM@LISTSERV.UARK.EDU Sent: Thursday, September 16, 2010 11:08 AM Subject: Re: CP unresponsive on certain guests Actually, Mike, he may be better off (a bit, at least) by setting STORBUFF 300 300 300. On 09/16/2010 09:58 AM, Mike At HammockTree wrote: Since the STORBUF setting is exactly the values I suggested, I suspect you applied the SET SRM STORBUFF 300% 250% 200% prior to doing the Q SRM With the current setting for STORBUFF, are you still experiencing the problem? Also, on a related note, what does your zVM paging system look like? The output of CP Q ALLOC PAGE will provide the information Mike - Original Message - From: Daniel Tate daniel.t...@gmail.com To: IBMVM@LISTSERV.UARK.EDU Sent: Thursday, September 16, 2010 10:52 AM Subject: Re: CP unresponsive on certain guests Output of Q SRM q srm IABIAS : INTENSITY=90%; DURATION=2 LDUBUF : Q1=100% Q2=75% Q3=60% STORBUF: Q1=300% Q2=250% Q3=200% DSPBUF : Q1=32767 Q2=32767 Q3=32767 DISPATCHING MINOR TIMESLICE = 5 MS MAXWSS : LIMIT=% .. : PAGES=99 XSTORE : 0% Ready; T=0.01/0.01 09:49:05 On Wed, Sep 15, 2010 at 5:47 PM, Dave Jones d...@vsoft-software.com wrote: Hi, Daniel. The answer to your first question is to use the CP FORCE command (HELP CP FORCE will tell you all about it.) The VM user id issuing the FORCE command needs to have privilege class A as well. Usually this is done from either MAINT or OPERATOR. The answer to your second question is a bit more difficult, I'm afraid. As Marcy has already suggested, what does a Q SRM command show? My first guess would be that your SLES11 guest is falling into Q3 and never given an opportunity to run. To find out *why* the guest is not able to run, you need the services of a good z/VM performance monitor.IBM offers the Performance Monitor (it comes bundles with z/VM, but it's an extra cost offering) and Velocity Software (http://www.velocity-software.com/) has a very good suite of products as well. IMHO it' practically impossible to run a modern production grade z/VM-zLinux system without a good performance monitor to help solve issues like the one your having now. On 09/15/2010 05:14 PM, Daniel Tate wrote: We're starting to run apps on the servers now. From time to time a guest will become unresponsive - to be more precise, ,the CP will not respond to commands, and neither will the guest OS (SLES11). not even #CP LOGOFF is acknowledged. from another login, CP INDIIC LOAD shows no appreciable load. Two questions from this: 1) how would I force a logoff of a user from another user? Is this possible? 2) if we are not paging and the IFLs are not loaded (2-3% utilization as a matter of fact) what could the bottleneck be? -- Dave Jones V/Soft Software www.vsoft-software.com Houston, TX 281.578.7544 -- Dave Jones V/Soft Software www.vsoft-software.com Houston, TX 281.578.7544
Re: CP unresponsive on certain guests
(I use MAINT too much..) If your SRM STORBUFF values are as you say, then STORBUFF is unlikely to be causing the problem, although still possible. The next time the problem occurs, do the CP IND and check for an Eligible list. If the E3 numbers are non-zero, then try raising the STORBUFF values further, as Davd suggested (300% 300% 300%). Mike - Original Message - From: Daniel Tate daniel.t...@gmail.com To: IBMVM@LISTSERV.UARK.EDU Sent: Thursday, September 16, 2010 11:42 AM Subject: Re: CP unresponsive on certain guests CP Q ALLOC PAGE gives me invalid option - alloc. I didnt set the SRM variables; the consultant who initially came in to set this up might have. On Thu, Sep 16, 2010 at 10:29 AM, Mike At HammockTree m...@hammocktree.us wrote: Yeah, that is probably where he needs to end up Dave, but I'm a little hesitant to recommend the 300% for Q3 without feeling more comfortable about his paging subsystem... Moving a couple of large guests from the E-list to in-Q could cause a increase in paging that he may or may not be configured to handle. Mike - Original Message - From: Dave Jones d...@vsoft-software.com To: IBMVM@LISTSERV.UARK.EDU Sent: Thursday, September 16, 2010 11:08 AM Subject: Re: CP unresponsive on certain guests Actually, Mike, he may be better off (a bit, at least) by setting STORBUFF 300 300 300. On 09/16/2010 09:58 AM, Mike At HammockTree wrote: Since the STORBUF setting is exactly the values I suggested, I suspect you applied the SET SRM STORBUFF 300% 250% 200% prior to doing the Q SRM With the current setting for STORBUFF, are you still experiencing the problem? Also, on a related note, what does your zVM paging system look like? The output of CP Q ALLOC PAGE will provide the information Mike - Original Message - From: Daniel Tate daniel.t...@gmail.com To: IBMVM@LISTSERV.UARK.EDU Sent: Thursday, September 16, 2010 10:52 AM Subject: Re: CP unresponsive on certain guests Output of Q SRM q srm IABIAS : INTENSITY=90%; DURATION=2 LDUBUF : Q1=100% Q2=75% Q3=60% STORBUF: Q1=300% Q2=250% Q3=200% DSPBUF : Q1=32767 Q2=32767 Q3=32767 DISPATCHING MINOR TIMESLICE = 5 MS MAXWSS : LIMIT=% .. : PAGES=99 XSTORE : 0% Ready; T=0.01/0.01 09:49:05 On Wed, Sep 15, 2010 at 5:47 PM, Dave Jones d...@vsoft-software.com wrote: Hi, Daniel. The answer to your first question is to use the CP FORCE command (HELP CP FORCE will tell you all about it.) The VM user id issuing the FORCE command needs to have privilege class A as well. Usually this is done from either MAINT or OPERATOR. The answer to your second question is a bit more difficult, I'm afraid. As Marcy has already suggested, what does a Q SRM command show? My first guess would be that your SLES11 guest is falling into Q3 and never given an opportunity to run. To find out *why* the guest is not able to run, you need the services of a good z/VM performance monitor.IBM offers the Performance Monitor (it comes bundles with z/VM, but it's an extra cost offering) and Velocity Software (http://www.velocity-software.com/) has a very good suite of products as well. IMHO it' practically impossible to run a modern production grade z/VM-zLinux system without a good performance monitor to help solve issues like the one your having now. On 09/15/2010 05:14 PM, Daniel Tate wrote: We're starting to run apps on the servers now. From time to time a guest will become unresponsive - to be more precise, ,the CP will not respond to commands, and neither will the guest OS (SLES11). not even #CP LOGOFF is acknowledged. from another login, CP INDIIC LOAD shows no appreciable load. Two questions from this: 1) how would I force a logoff of a user from another user? Is this possible? 2) if we are not paging and the IFLs are not loaded (2-3% utilization as a matter of fact) what could the bottleneck be? -- Dave Jones V/Soft Software www.vsoft-software.com Houston, TX 281.578.7544 -- Dave Jones V/Soft Software www.vsoft-software.com Houston, TX 281.578.7544
Re: CP unresponsive on certain guests
When you do the IND LOAD (or just IND), does the E3 field have any non-zero number? If yes, then you have formed a Eligible list. You should investigate and understand the implications, but the quick fix is to set a more reasonable SRM STORBUFF value, for example: CP SET SRM STORBUFF 300% 250% 200% might be a reasonable starting point. Use with a bit of caution as this may invite high paging rates if you have significantly overcommitted storage. Mike - Original Message - From: Daniel Tate daniel.t...@gmail.com To: IBMVM@LISTSERV.UARK.EDU Sent: Wednesday, September 15, 2010 6:14 PM Subject: CP unresponsive on certain guests We're starting to run apps on the servers now. From time to time a guest will become unresponsive - to be more precise, ,the CP will not respond to commands, and neither will the guest OS (SLES11). not even #CP LOGOFF is acknowledged. from another login, CP INDIIC LOAD shows no appreciable load. Two questions from this: 1) how would I force a logoff of a user from another user? Is this possible? 2) if we are not paging and the IFLs are not loaded (2-3% utilization as a matter of fact) what could the bottleneck be?
Re: VM/ESA TCP/IP and VSWITCH
Hi Billy I'm no expert at this, but you've defined your device as a LCS device, not a QDIO. A VSwitch has to be QDIO, so you need to change your device (and link) statements accordingly. For instance, I have DEVICE OSAQDIO OSD 0440 PORTNAME OSA1 PRIROUTER AUTORESTART LINKETH0QDIOETHERNET OSAQDIO1 ane the linkname in the home statement points to ETH0 device 440 is a 'port' into the VSwitch. In your case, your TCPIP is in a 2nd level system, but it still has to be in QDIO mode. If your level of TCP/IP does not support QDIO, you will find out as soon as it tries to process the DEVICE staatement. Mike Hammock - Original Message - From: Billy Bingham To: IBMVM@LISTSERV.UARK.EDU Sent: Friday, March 19, 2010 12:17 PM Subject: Re: VM/ESA TCP/IP and VSWITCH Well I'm guessing it can't. I have the following in my TCPIP PROFILE: DEVICE OSA1LCS600 ; LINKOSA1LNK ETHERNET 0 OSA1 ; ARPAGE 5 ; HOME 10.1.1.93 OSA1LNK ; GATEWAY 10.1.1.1 =OSA1LNK 1500HOST DEFAULTNET=OSA1LNK 15000 ; TRANSLATE ; START OSA1 And I get the following in the TCPIP console log: DTCPRI385I Device OSA1: DTCPRI386I Type: LCS, Status: Not started DTCPRI387I Envelope queue size: 0 DTCPRI388I Address: 0600 I change it to this: DEVICE OSA1OSD600 ; LINKOSA1LNK QDIOETHERNET 0 OSA1 ; ARPAGE 5 ; HOME 10.1.1.93 OSA1LNK ; GATEWAY 10.1.1.1 =OSA1LNK 1500HOST DEFAULTNET=OSA1LNK 15000 ; TRANSLATE ; START OSA1 And I get the following: DTCPRS007E Error encountered in reading PROFILE TCPIP *: DTCPAR123I Line 237: Invalid type field DTCPAR123I Line 239: LINK statement: Invalid type field DTCPAR123I Line 244: Unknown link name in HOME cmd DTCPAR123I Line 247: Unknown link name in GATEWAY cmd DTCPAR123I Line 252: Device not found Line 237 corresponds to my DEVICE statement and line 239 is the LINK statement. 600 - 602 is attached to my TCPIP on the VM/ESA 2.40 guest and I have NICDEF and GRANT for the VMEASA240 guest in z/VM Unless anyone can point out something obivious I'm going to chalk this up to experience. Thanks, Billy On 17 Mar 2010 at 10:13, The IBM z/VM Operating System wrote: Hello, Would VM/ESA running 2nd level under z/VM be able to use the VSWITCH? Thanks, Billy
Re: VSWITCH
Wouldn't it be more correct to qualify it with something like: ... as long as the guest supports a QDIO interface for TCP/IP.?? There are still lots of old guests floating around that do not understand QDIO... Mike Hammock - Original Message - From: Rich Smrcina r...@velocitysoftware.com To: IBMVM@LISTSERV.UARK.EDU Sent: Wednesday, March 03, 2010 11:02 AM Subject: Re: VSWITCH On 03/03/2010 09:49 AM, Billy R. Bingham wrote: I think I know the answer to this. Can a VSWITCH be used for any guest OS running under z/VM? IE: z/VSE, z/OS, etc. Thanks, Billy Yes, absolutely. -- Rich Smrcina Phone: 414-491-6001 http://www.linkedin.com/in/richsmrcina Catch the WAVV! http://www.wavv.org WAVV 2010 - Apr 9-13, 2010 Covington, KY
Of interest to Developers
Please excuse a slightly off-topic message, but since a number of System z developers tend to follow this group, I thought this would be of general interest. IBM has just announced the availability of their zPDT (System z Personal Development Tool) to qualifying members of IBM's PartnerWorld for Developers. zPDT is an emulation based system that IBM has been using internally for several years and is well tested and proven. It runs on an Intel/Linux platform and can provide one to three processors (CP, IFL, zIIP, or zAAP). I have teamed up with Stan King, ITC (Information Technology Company, LLC) to help bring zPDT based systems to the development community. We are still in the process of defining the exact configurations, but there will be a mobile (ThinkPad) version, a Midrange and a Enterprise version. We are not ready to quote any performance numbers yet, but with the current Intel processor line, we expect performance to be very good. For more information, you can check the ITC web site ( www.p390.com/zpdt.htm ) and the IBM PartnerWorld web site ( www.ibm.com/partnerworld ). If you have any questions, feel free to email me off-list. Mike Hammock ITC mhamm...@p390.com
Re: Which HMC Task allows specifying Load address
It's on the Load screen/panel; the same one as you initialte the IPL sequence from. Load is under the Recovery group of tasks. Mike - Original Message - From: Suleiman Shahin s_s_sha...@hotmail.com To: IBMVM@LISTSERV.UARK.EDU Sent: Wednesday, August 19, 2009 4:56 PM Subject: Which HMC Task allows specifying Load address Greetings folks! I am going through the manual trying to find the HMC task that requires you or allows you to enter a different load address from the current. The hardware is 2096. It's been a while! Thanks. Suleiman Shahin _ Windows Live: Keep your friends up to date with what you do online. http://windowslive.com/Campaign/SocialNetworking?ocid=PID23285::T:WLMTAGL:ON:WL:en-US:SI_SB_online:082009
Re: IOCP, Dynamic I/O and Tokens
Bob, you hit a fairly frequently occuring problem. A number of the HMC panels are, in my view, poorly designed or labeled. There are numerous times when you need to take (click on) the non-intutative option. Some of the more intiative options appear to exit, but actually leave the task running. We tend to have an adversion to 'cancel'ing a function; we'd rather 'stop' or 'exit' or such but sometimes this leaves the task running in the background. If you run into this situation, with a task still running somewhere I tend to start miminizing (not closing) HMC windows until I can see the window for the task still running, then cancel that task/window. There are better ways (more proper) to find these hidden tasks (I think there is a icon in the upper left area that will show all running tasks) but this is the simple and straightforward way that I can remember... Mike Hammock - Original Message - From: Frankovich, Bob bfrankov...@scspa.com To: IBMVM@LISTSERV.UARK.EDU Sent: Tuesday, August 11, 2009 9:10 AM Subject: Re: IOCP, Dynamic I/O and Tokens I got an hour this morning so I came in at 5:00 to perform the POR on our z9. The original IOCP change was to change an OSA port from Non-QDIO to QDIO but I also added MAXDEV=(CSS(0),500,0) to the RESOURCE. After the POR, I tried to do an ACTIVATE and received a message about insufficient Central Storage. It said only 6912K was available and to Customize the Activation Profile, reduce Central Storage, and try again. I did this and tried again but for some reason the Custom Activation Profile task was still active. I'm positive I did the SAVE, was I supposed to do something else after that? I finally had to go into Users Tasks and canceled the task. I wa s able to do the Activate then, and then the LOAD. This entire process is NOT very clear to me. The business partner set it all up and now we're supposed to be able to figure it all out. If anyone could enlighten me o n the process to perform a POR and to change Central Storage I would really appreciate it. Thanks!
Re: RSU instalation question
Hello Grady.. welcome to the list... As the others have said, you will use service and put2prod to apply the new ( and all future) RSUs. The thing that may seem different for this (and future) RSUs is that you actually did part of the RSU process during the initial install because the DVD install process loads the contents of the RSU DVD/tape to the MAINT 500 disk. Now you have to load the RSU/files to the 500 disk yourself (DVD/electronic files) or make the tape available to service on a drive attached as 181 (for tape RSU). Mike - Original Message - From: Charles Grady charles.gr...@dol.state.ga.us To: IBMVM@LISTSERV.UARK.EDU Sent: Thursday, August 06, 2009 8:49 AM Subject: RSU instalation question I have just installed z/VM 5.4 and RSU0901. I now see that RSU 0902 is out; yes I've ordered it. Question: Can I now use SERVICE PUT2PROD that I have just used to install the RSU0901 that was shipped along with the z/VM5.4 IIS?? Note: I have NOT started customizing anything yet. It's been quite a few years since I've VMed anything - good to be back - but IT'S CHANGED! Appreciate your assistance. Thanks ** GDOL CONFIDENTIALITY NOTICE: This transmission may contain confidential information protected by state or federal law. The information is intended only for use consistent with the state business discussed in this transmission.If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or the taking of any action based on the contents is strictly prohibited. If you have received this transmission in error, please delete this email and notify the sender immediately.Your cooperation is appreciated. **
Re: First OSA config.
The first question, Bob, is Why are you using OSASF at all?? OSASF is not needed/used by the ICC port of the OSA. If you change your definition of the other port (PCHPID 110) to OSD and run in QDIO mode you won't need OSASF. You can have zVM and multiple guests all use/share that port witth no OSASF. zVM could have ports 1460-1461, guest 1 could have 1462-1463, guest 3 could have 1464-1465, etc Of course you will have to change your zvm and guest TCP/IP definitions to use QDIO mode, but that is generally very simple and this avoids the complications of OSASF. Of course, the zVM folks here will also probably point out that you could just define a VSWITCH and connecct the port to that and then connect the zVM IP stack and all the guersts to that VSWITCH. This all does assume that your guests will support QDIO mode. Old systems may present a problem. Mike - Original Message - From: Frankovich, Bob bfrankov...@scspa.com To: IBMVM@LISTSERV.UARK.EDU Sent: Thursday, July 02, 2009 9:35 AM Subject: First OSA config. I'm trying to figure out how to configure the OSA card on our z9 box. I'v= e never worked with OSA's before so I have more questions than answers. AN= Y help will be appreciated. The initial OSA config was done by a business = partner. These are the IOCP def's : CHPID PATH=(10),TYPE=OSE,PCHID=110,PART=PROD CHPID PATH=(11),TYPE=OSC,PCHID=111,PART=PROD CNTLUNIT PATH=(10),UNIT=OSA,CUNUMBR=1460 IODEVICE ADDRESS=(1460,15),UNIT=OSA,UNITADD=00,CUNUMBR=1460 IODEVICE ADDRESS=(146F,1),UNIT=OSAD,UNITADD=FE,CUNUMBR=1460 * CNTLUNIT CUNUMBR=E020,PATH=(11),UNIT=OSC IODEVICE ADDRESS=(E020,08),CUNUMBR=(E020),UNIT=3270 We are using E020 E021 for our VM Prod VSE consoles. I've been trying to set up the CMS Users OSASF, OSAMAINT, OSADMIN1 = 2 3 using the OSA Implemntation redbook the OSA Customer guide. I have= not done anything with user 4OSASF40, should I? I've gone thru chapter 4 (Setting up OSA/SF on z/VM) and I'm pretty sure I have everything defined= as it says to. We're running z/VM 5.4 When I logon to OSADMIN1 and enter IOACMD, I get the menu back but when I= select option 4 to get the config, I get : CMALLC_PRODUCT_SPECIFIC_ERROR: CMSIUCV CONNECT completed with return cod= e 1011 The only explanation I've found to this message says I don't have TASF = installed ??? Obviously I'm not doing something right! All ideas will be appreciated =
Re: Testing Linux Z/vm
It would also be interesting to know the response from a: CP Q SRM STORBUF Mike Hammock - Original Message - From: August Carideo august.cari...@avon.com To: IBMVM@LISTSERV.UARK.EDU Sent: Friday, June 26, 2009 11:54 AM Subject: Re: Testing Linux Z/vm yes we are ficon, also using VDISk for swap, and we have changed the mach size as suggested and a few other things we have Velocity monitoring S/W we are waiting on the Philippines to retry the test thanks all for the feed back, Augie As you can see right now nothing is going on - so nothing new to report ind paging No users in page wait Ready; T=0.01/0.01 11:54:19 ind AVGPROC-000% 02 XSTORE-00/SEC MIGRATE-/SEC MDC READS-01/SEC WRITES-01/SEC HIT RATIO-095% PAGING-0/SEC STEAL-000% Q0-1(0) DORMANT-00019 Q1-1(0) E1-0(0) Q2-0(0) EXPAN-001 E2-0(0) Q3-1(0) EXPAN-001 E3-0(0) PROC -000% IFL PROC 0001-000% IFL LIMITED-0 Ready; T=0.01/0.01 11:54:23 Tom Duerbusch duerbus...@stlou iscity.comTo Sent by: The IBM IBMVM@LISTSERV.UARK.EDU z/VM Operating cc System ib...@listserv.u Subject ARK.EDU Re: Testing Linux Z/vm 06/26/2009 11:35 AM Please respond to The IBM z/VM Operating System ib...@listserv.u ARK.EDU With Oracle, someone is listing to the PC side of the house. That is, inexpensive MIPS, inexpensive memory, expensive I/O. Hence you want SGA to be as big as possible. On the IFL side, MIPS are still relatively expensive, memory is still relatively expensive, and assuming you are on FICON, I/Os are cheap. Since you are just testing, cut the SGA in half, make the Linux guest about 512 MB bigger than the SGA, make the swap disks, VDISKS and prioritize them. You shouldn't have VM paging. If you are planning on pounding I/O during the testing, don't forget I/O balancing on you DASD subsystem. Make sure heavy I/O is spread across raid arrays and controllers. The default tends to be accending CUA tend to be on the same Raid adapter, until you jump to the next one. Now, if you are really doing a full up Oracle test, that is, a full set of applications, driven by some sets of test scripts, you are going to need someone to configure your system for performance (of course you have a performance monitor for VM). Your current Oracle platforms were not setup for performance in a day. Don't expect that on the mainframe, in a day. But most testing, isn't in this arena and you can grow and tune the system as you go. It will be interesting to hear the progress of your testing. Tom Duerbusch THD Consulting Rob van der Heij rvdh...@velocitysoftware.com 6/25/2009 10:11 AM On Thu, Jun 25, 2009 at 5:56 AM, Marcy Your guest is bigger than your real storage. If you need to do that overcommitting (and you may not - see Rich's question about SGA sizes), Overcommitting resources is good, because it is the only way to enforce sharing resources. But defining a single Linux guest larger than your total z/VM storage is just bragging. And that is bad ;-) As Rich says, you can't reduce the virtual machine size without also adjusting Oracle's expectations (SGA and PGA). Otherwise Linux would need to swap those areas and things go bad as well with two managers involved. Rob -- Rob van der Heij Velocity Software http://www.velocitysoftware.com/
Re: Testing Linux Z/vm
While the other responders have made excellent suggestions/comments, I suspect the problem (and fix) may be simpler. This environment and problem sounds like a good example of an eligible list being formed and that one large Linux guest being stuck in it, not allowed to run. Doing a CP IND Q will show the existance of an Eligible list (E3 value non-zero). If this is the case, you can probably effecct an immediate improvement by changing the SRM STORBUF values. Note that this MAY cause an increase in the paging rates if the Linux guest is using all that memory, so you should have a good paging subsystem to handle it. Although the average paging rate may go up, it will probably be a more consistent paging rate rather than the somewhat bursty pattern of a guest going in and out of the eligable list. I'd try an initial STORBUF value something like: CP SET SRM STORBUF 150% 200% 250% and see if that makes a difference. Of course, reducing the size (virtual storage) of the Linux guest would accomplish much the same thing, but the STORBUF change is immediate and does not require a stop and restart of the guest. Mike Hammock - Original Message - From: August Carideo august.cari...@avon.com To: IBMVM@LISTSERV.UARK.EDU Sent: Wednesday, June 24, 2009 4:02 PM Subject: Testing Linux Z/vm We are preparing for a test and loading the database is taking forever. Paging is high. I/O devices are less than 5% busy. CPU is never more than 20%. An Oracle file import is taking over 14 hours. Any Idea's with this little bit of info to go on Also is there a reason for the TCPIP machine to be set at 128M? the real machine is 2 IFLs and 16G of storage. We see the paging coming from the oracle machine( 2CPUs VM size =24G), Maint and TCPIP. Maint was set at 128M and IPLing a non shared copy of CMS. We set Maint to 16M and IPL a shared copy of CMS. His paging has stopped. I would like to set TCPIP at something less that 128M either 16M or 32M to stop his paging. Does this sound right ? Augie
Re: Using DVD to restore an existing z/VM?
A couple of interesting aspects of this boot from the USB idea The z10, which is where the boot from DVD is supported, comes with a HMC that has both the DVD and a couple of USB ports. USB is supported as an inport/export device for configuration files. The HMC runs Linux and Linux treats the DVD and USB in a very similar manner (from the user perspective). So conceptually(!) it should be a relatively simple move from booting from DVD to booting from USB. With 16, 32, and even 64 GB USB flash drives these days, there are all kinds of possibilities for having very portable systems. Mike Hammock - Original Message - From: Edward M Martin emar...@aultman.com To: IBMVM@LISTSERV.UARK.EDU Sent: Friday, June 19, 2009 10:02 AM Subject: Re: Using DVD to restore an existing z/VM? I am voting for the USB D/R tool. What type of requirement do we have to create? Ed Martin Aultman Health Foundation 330-363-5050 ext 35050 -Original Message- From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Huegel, Thomas Sent: Thursday, June 18, 2009 10:01 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Using DVD to restore an existing z/VM? I am liking the USB port idea even more. How cool would it be to walk into a D/R site with just a couple of thumb drives in your pocket to restore your whole z/VM system? -Original Message- From: The IBM z/VM Operating System on behalf of Alan Altmark Sent: Thu 6/18/2009 5:16 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Using DVD to restore an existing z/VM? On Thursday, 06/18/2009 at 03:45 EDT, Dave Jones d...@vsoft-software.com wrote: Alan, I said to simply document the procedurenot that the procedure itself was simple:-) I know what you said. :-) The procedure for building a DVD image includes tools that you don't have, so you would then ask for the tools. But the procedure and tools have value. And down the rabbit hole we go I KNOW how this story ends. :-) Maybe the good Dr. Boyes could write up and submit the requirement to WAVV? You could, but I would like to gently suggest that it isn't going to happen. If you want to be able to have a system that is recoverable from the DVD drive, then that is the requirement to levy. And since it is a function of backup/DR, it properly belongs to the backup products. But keep in mind that its all part and parcel of the larger requirement to get z/VM to support storage devices other than SCSI disk, ECKD, FBA, and 3590 tape. Alan Altmark z/VM Development IBM Endicott
